JUDGMENT : P.D. Desai, J. The first petitioner is an Association of Non-gazetted employees of the Sales-tax Department of the State Government. The second, third and fourth petitioners are employees of the State Government in the said Department. The first respondent is the State of Gujarat and the second respondent is the Commissioner of Sales-tax, Gujarat. 2. Amongst the posts borne on the staff of the Sales-tax Department is the post of Sales-tax Inspector. Recruitment to the said post is governed by statutory rules framed under Article 309 of the be Constitution of India. The said rules are known as the Sales-tax inspectors Recruitment Rules, 1976 (hereinafter referred to as 'the rules'). The Rules were promulgated on August 17, 1976, I shall presently examine the various provisions of those rules. For the time-being, suffice it to say that appointment to the post of Sales-tax Inspector is required to be made either by direct selection or by promotion in certain proportion. The present petition involves the question of interpretation of clause (a) of Rule 2 of the Rules which lays down the criterion for appointment by direct selection. 3. It appears that 120 posts of Sales-tax Inspectors are lying vacant and they are required to be filled in by direct selection. The second respondent. Therefore, issued an advertisement which was published in the newspapers on August 5, 1976 inviting applications from eligible candidates. In response to the said advertisement, more than 15000 candidates applied including the second, third and fourth respondents. Such large number of applications required the adoption of some test for screening the candidates at the threshold. It was found that more than 1000 applicants were holding First Class Degrees in different Faculties of Recognized Universities. Amongst them there were about 580 First Class Commerce Graduates, about 101. First Class Arts Graduates and about 500 First Class Science Graduates. Looking to the number of posts that were to be filled up by direct selection and having regard to the fact that more than 1000 candidates possessed First Class degrees in various Faculties of recognised Universities, the second respondent, at the stage of screening, restricted the field of choice to First Class Graduates only and decided not to call for interview Second Class or Third Class Graduates including Graduates having Commerce Degree with Accountancy as the subject. It is this decision of the second respondent which has given rise to the present petition at the instance, inter alia of the second, third and fourth petitioners who were amongst the candidates eliminated since two of them are graduates in Commerce with Accountancy as the subject, holding Second Class Degree, and one of them is a Commerce Graduate with Accountancy, holding a Third Class Degree. It might be stated that one of the petitioners also holds a post-graduate Degree in Commerce. 4. The contention of the petitioners is that under Rule 2 (a) of the Rules appointment to the post of Sales-tax Inspectors is to be made by direct selection of a person who : (1) shall be not more than 26 years of age; and (2) possesses a degree of a recognised University, but preference has to be given to a candidate echo possesses the degree of B. Com. with Accountancy, or Chartered Accountants, or passes a qualification recognised to be equivalent to such examination by the Government of Gujarat and that accordingly in order to meet with the requirement of the preference clause, all Graduates who possess B.Com. Degree with Accountancy, or a qualification recognised to be equivalent to such examination by the Government of Gujarat, or who are Chartered Accountants were required to be called for interview, irrespective of whether the concerned candidate held the graduate degree in First Class, Second Class or Third Class. According to the petitioners, screening was a step in the process of direct selection and even at that stage, the preference rule operated with full vigour and, therefore, Commerce Graduates with Accountancy as a subject were required to be preferred even to First Class Graduates of other faculties and by adopting the screening test that he did, the second respondent violated the statutory Rule 2(a). 5. The case of the respondents, on the other hand, is that having regard to the large number of applicants, it was necessary to demarcate a field of choice or zone of selection and that, therefore, a very rational test was adopted by the authorities of inviting for interview only those candidates who possessed First Class Degree in the various disciplines of the recognised Universities. The respondents contend that on a true interpretation of the relevant rule relating to appointment by direct selection, all persons who held a degree of a recognised University, irrespective of the faculty, branch or discipline, in which they possessed such a degree, were entitled and eligible to be considered for the post of Saves-tax Inspector and that, therefore, to invite only First Class Graduates in various faculties was not only rational but was also permissible under the Rules. The preference clause, according to the respondents, operates at the stage of appointment and Commerce Graduates with Accountancy and others referred to in Rule 2 (a) are to be preferred, everything-else being equal, at that stage. 6. From the foregoing statement of facts and narration of the rival case of the parties, it would appear that the only question in this case is one of the true interpretation of the relevant Recruitment Rule. The Rule with which we are directly concerned is Rule 2 (a). However, in order to inter. piet the Rule in its proper context, it would be necessary to set out the whole of Rule 2. The said Rule reads as under : "Appointment to the post of Sales Tax Inspectors shall be made either. (a) by direct selection of a person who:- (i) shall be not more than 26 years of age; and (ii) possesses a degree of a recognised University. Provided that preference shall be given to a candidate who possesses the degree of B. Com. with Accountancy or Chartered Accountants or possesses a qualification recognised to be equivalent to such examination by the Government of Gujarat; or (b) by promotion of a person of proved merits and efficiency from amongst the persons holding the posts of Senior Clerk in the Sales Tax Department who has served satisfactorily for about four years in the Sales tax Department and who has passed the examination prescribed for Sales Tax Inspectors." It might also be useful to refer to the other Rules which have a bearing on the matter under consideration. Rule 3 prescribes the ratio between the posts to be filled in by direct selection and by promotion and the ratio is 3:2, that is to say, three candidates by direct selection and two candidates by promotion. Rule 3 prescribes the ratio between the posts to be filled in by direct selection and by promotion and the ratio is 3:2, that is to say, three candidates by direct selection and two candidates by promotion. Rule 5, inter alias provides that a candidate appointed by direct selection shall have first to undergo a course of training for a period of three months conducted by the Sales Tax Department and Rule 6 makes a similar provision in respect of the promotees. Rule 7 provides that direct recruit shall be required to pass the Departmental Examination in specified period and in specified chances in accordance with the rule, prescribed by the Government in that behalf from time to tine. Rule 9 provides that if such a candidate fails to pass the Departmental Examination, his services shall be terminated. 7. Having set out the relevant Rules, let us proceed to construe Rule 2 (a) which, as earlier stated, is the provision which falls for direct consideration inasmuch as the petitioners, though they are employees of the Department, offered themselves as candidates for recruitment by direct selection. The said clause of Rule 2 provides for appointment to the post of Sales Tax Inspectors by direct selection and lays down the minimum eligibility qualifications. Two qualifications which are laid down are that the candidate must not be more than 26 years of age and must possess a degree of a recognised University. It would thus appear that every person, who possesses a degree of a recognised University, is eligible for being considered for direct recruitment provided he has not crossed the age of 26. This is the substantive provision of clause (a) of Rule 2 and he it noted that it makes no distinction between the Graduates of various faculties. There is, however, a proviso to clause (a) which says that preference shall be given to a candidate who :(1) possesses the degree of B. Com, with Accountancy; (2) is a Chartered Accountant; (3) posseses a qualification recognised to be equivalent to such examination by the Government of Gujarat. There is, however, a proviso to clause (a) which says that preference shall be given to a candidate who :(1) possesses the degree of B. Com, with Accountancy; (2) is a Chartered Accountant; (3) posseses a qualification recognised to be equivalent to such examination by the Government of Gujarat. The proviso, therefore, engrafts a rule of preference on the substantive provision and it requires the appointing authority to give a preference, while considering direct recruits for to the appointed post, to a candidate of the Commerce Faculty having Accountancy as the subject, or to a Chartered Accountant or to a person who possesses a qualification recognised to be equivalent to such examination by the State Government. It is required to be borne in mind, however, that the preference is to he given in making appointment by direct selection and that though the preference clause does not say so in so many words, the question of giving preference can only arise when Graduates from the other faculties and the faculty of Commerce are found to be of equal merit. This is implicit in the rule of preference and will have to be read into it in order to give it a reasonable construction. It is inconceivable that in a matter of recruitment to a public service, the rule-framing authority could have envisaged that preference should be given to Commerce Graduates with Accountancy as one of the subjects or to a candidate having the other specified qualifications in clause (a) even though he is found, at an open competition between graduates of all faculties, to be a person who cannot be bracketed on merits with candidates who are graduates from other faculties. This construction derives support also from the substantive provision of the Rule which makes all graduates, irrespective of faculty. breach or discipline, eligible for being considered for appointment by direct selection. To hold that the rule of preference was enacted to give to Commerce graduates with Accountancy or to candidates having other prescribed qualifications an absolute preference over the graduates of other faculties would be to denude the substantive provision of much of its force and effect and to covert the rule of preference into a rule of reservation thereby obliterating altogether the right of other candidates possessing degree of recognised Universities in various other faculties to be considered for the post. Such could not be the reasonable construction of the rule and it could not even have been the intention of the framers of the Rules. 8. It was strenuously urged on behalf of the petitioners that, if at the very stage of screening, candidates holding second Class or Third Class Degrees in Commerce with Accountancy as a subject are permitted to be weeded out, the preference clause would become meaningless and it would enable the recruitment agency to leave out of consideration a class of candidates who are required to be given a preferential treatment in the matter of appointment. The argument, in the first place, is misconceived, for, it proceeds upon a misconception of the true meaning and scope of the preference clause as explained above. In the next place, it is well-settled that though the Recruitment Rules may prescribe the minimum eligibility qualification, it is competent to an appointing authority to demarcate the field of choice, that is to say, to prescribe some rational screening test by the adoption of which the necessity of calling for interview or for examination, as the case may be, every eligible candidate is eliminated and the zone of selection is restricted to candidates with merit bearing a reasonable proportion to the number of vacancies to be filled up. In other words, though an obligation to consider every qualified candidate may be implicit in the recruitment rules as also in the equal opportunity right enshrined in Articles 14 and 16 of the Constitution, screening a candidate out of consideration at an initial stage of the process of selection is not illegal or unconstitutional, if a legitimate field demarcating the choice by reference to some rational formula is carved out. The power to prescribe a zone of selection or field of choice cannot be denied even in a case where there is a preference clause inasmuch as the rule of preference will still continue to operate in the restricted zone of consideration. In the present times of large-scale unemployment, unless such power is recognised, the appointing authority will have to allow every eligible candidate to compete in the process of selection at all stages; upto the final appointment, involving such waste of public time, money and energy and arousing false hopes in the minds of the competing candidates. In the present times of large-scale unemployment, unless such power is recognised, the appointing authority will have to allow every eligible candidate to compete in the process of selection at all stages; upto the final appointment, involving such waste of public time, money and energy and arousing false hopes in the minds of the competing candidates. There is, therefore, nothing inherently wrong in restricting the field of choice in the present case to First Class graduates of various faculties, The test adopted is undoubtedly rational and time-honoured and it has direct nexus with the object of selection, for the object is to draw upon the best talent in order to fill up the requisite number of posts. In the present case, about 1181 candidates qualify for consideration on adoption of this test and such number of candidates bears a reasonable proportion to the number of vacancies to be filled up, namely, 120. 9. It is true that Commerce graduates having Accountancy as the subject and candidates having other prescribed qualifications are required to be preferred under the proviso to clause (a). However, as earlier stated, the rule of preference operates at the stage of appointment and, that too, provided all other things are equal, and it will still continue to operate even in the restricted field of choice. Therefore, amongst First Class graduates of various faculties, graduates belonging to the Commerce faculty, having Accountancy as a subject, or candidates having other prescribed qualifications, will have to be preferred, provided everything else is equal, at the stage of final selection. It would be unreasonable, indeed illogical , to hold however, that the preference clause contains a fact to the effect that, at the rage of screening, a Third Class Commerce graduate must be grouped with a First Class graduate of another faculty and that he could be eliminated only at the stage of final selection. Such is not the effect and intendment or the preference clause and to lace it on such an absolute pedestal would render the underlying object of the Recruitment Rules nugatory and make the process of selection cumbersome. It would thus appear that there is no violation either of any constitutional guarantee or of any statutory provision in the second respondent adopting the aforesaid screening test. 10. It would thus appear that there is no violation either of any constitutional guarantee or of any statutory provision in the second respondent adopting the aforesaid screening test. 10. Another point which was pressed for serious consideration was that the nature of duties to be performed by the Sales Tax Inspectors requires them to have specialised knowledge of accountancy and that it is with that object in mind that the rule of preference was enacted in the Recruitment Rules and that, therefore, to weed out Commerce graduates with Accountancy as a subject at the screening; stage would frustrate the salient provision made in the preference clause with the end in view of recruiting the best talent suited to perform the duties of the jab efficiently. There is no material on the record of the case to indicate as to what the duties of a Sales Tax Inspector are. Assuming, however, that a Sales Tax Inspector is required to go into the account-books of the various assesses and that, therefore, ordinarily he should be a person who is well-qualified to deal whit matters relating to accounts, there is no reason to hold that by bringing into the held of choice First Class graduates of all faculties, the most suitable person would not he selected and the best talent suitable for the jib would not be recruited. In this connection, two things are required to he home in mind. First, the field of choice having been carved out so as to limit it to candidates who have a meritorious academic record at the final University Examinations, candidates passing the screening test would ordinarily he persons possessing certain intellectual calibre and statute. It may not be difficult for them to acquire necessary equipment for the job in course of time and to give their best, Secondly and this is more important candidates appointed by direct selection are required under the Recruitment Rules to undergo a course of training conducted by the Department. It is legitimate to presume that in the course of such training they will be imparted all the knowledge and practical education requisite for the job. The candidates will then have to pass a Departmental Examination in specified period and in specified chances and failure to pass such Examination accordingly results in the termination of services. It is legitimate to presume that in the course of such training they will be imparted all the knowledge and practical education requisite for the job. The candidates will then have to pass a Departmental Examination in specified period and in specified chances and failure to pass such Examination accordingly results in the termination of services. In would thus appear that there is an in built safeguard in the the Rules them-selves for testing the suitability of such candidates for the job even after selection and that if it is found that they have still not acquired the proficiency and skill required for the job, their services are liable to be terminated. The interests of public service would not, therefore, suffer and the underlying object would not be frustrated by interpreting the Rule in the aforesaid manner. 11. The foregoing discussion would show that the test adopted by the second respondent for demarcating the zone of choice in the present case is not violative either of the constitutional guarantee or of the relevant statutory rules. The present petition must, therefore, fail. 12. Rule discharged with no order as to costs. Rule discharged.